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1. 发明申请

WO1998001927A1 OPTICAL PARAMETRIC OSCILLATOR 审中-公开
标题翻译：光学参数振荡器
公开(公告)号：WO1998001927A1
公开(公告)日：1998-01-15
申请号：PCT/GB1997001790
申请日：1997-07-03
申请人： THE SECRETARY OF STATE FOR DEFENCE , COLVILLE, Finlay , DUNN, Malcolm, Harry , EBRAHIMZADEH, Majid
发明人： THE SECRETARY OF STATE FOR DEFENCE
IPC分类号： H01S03/108
CPC分类号： H01S3/1083 , G02F1/39
摘要： An optical parametric oscillator system comprises a continuous wave, singly resonant optical parametric oscillator (OPO) arranged within the cavity of a laser used to generate the pump wave. The pump laser may have a widely tuneable laser gain medium which enables the OPO to be tuned through the tuning of its pump wave. The pump laser may generate a multiaxial mode pump wave which pumps a non-linear crystal in the OPO to generate two down converted waves; one of the generated waves is resonated in the cavity of the OPO whilst the other generated wave is prevented from resonating by being coupled out of the OPO cavity to form an output signal. A mirror arrangement common to both pump laser and OPO may be used to focus and to ensure co-axiality and co-linearity of pump and resonated waves within the non-linear material; this enhances the setting up and optimisation of the intracavity OPO. Additionally, means may be provided to efficiently couple out a fraction of the resonated wave as a useful output. This resonated output may be single frequency even in the presence of a multimode pump waved. Further, means may be provided to allow the frequencies of the two down converted waves to be independently tuned.
摘要翻译：光学参量振荡器系统包括布置在用于产生泵浦波的激光器腔内的连续波，单谐振光参量振荡器（OPO）。泵激光器可以具有可广泛调节的激光增益介质，其使得能够通过调谐其泵波来调节OPO。泵激光器可以产生多轴模式泵浦波，其在OPO中泵浦非线性晶体以产生两个向下转换的波; 所产生的波中的一个在OPO的腔中谐振，而另一个产生的波被通过耦合到OPO腔外而被阻止谐振以形成输出信号。可以使用泵浦激光器和OPO共同的镜子布置来聚焦并确保泵和谐振波在非线性材料内的共轴和共线性; 这增强了腔内OPO的设置和优化。另外，可以提供用于有效地将谐振波的一部分耦合作为有用输出的装置。即使在存在多模泵波形的情况下，该共振输出也可以是单个频率。此外，可以提供装置以允许两个下变频波的频率被独立调谐。

2. 发明申请

WO1993019504A1 HIGH EFFICIENCY 16'mu'm LASER SOURCE 审中-公开
标题翻译：高效率16亩激光源
公开(公告)号：WO1993019504A1
公开(公告)日：1993-09-30
申请号：PCT/GB1992000553
申请日：1992-03-26
申请人： SYNERGETIC RESOURCES LIMITED , ANDREOU, Doros
发明人： SYNERGETIC RESOURCES LIMITED
IPC分类号： H01S03/108
CPC分类号： H01S3/1086
摘要： A simple tunable 16 mu m radiation source capable of operating at very high efficiency and repetition rates, with minimum capital and maintenance costs, for Uranium Hexafluoride (UF6) isotope separation is described. The basic concept of the invention uses the fact that due to the low gain of the Raman active medium (para-Hydrogen gas), the CO2 laser pulse which is trapped in a cavity with no output coupling, fully develops and having no other means of escaping it traverses the Raman active medium as many times as possible until it is converted into the Raman shifted wavelength and is emitted through the Raman subcavity. Only the 16 mu m output can be emitted from the system and it can easily be tuned around 628.32 cm simply by tuning the grating in the figure. Specific cavity designs allow for repetitive refocusing of both the laser and Raman beams enabling threshold to easily be achieved even with very small systems of 5 to 10 mJ. The system can also be used for producing Stokes radiation at the S(2) rotational level of Deuterium at 414.17 cm at room temperature and atmospheric pressure requiring only a commercial atmospheric CO2 laser system for the MLIS process. In addition it can be modified to produce up-conversion of the CO2 wavelengths using the anti-Stokes radiation process.
摘要翻译：描述了一种简单的可调谐16μm辐射源，能够以最低的资本和维护成本以非常高的效率和重复率运行六氟化铀（UF6）同位素分离。本发明的基本概念使用由于拉曼活性介质（对氢气）的低增益而被捕获在没有输出耦合的空腔中的CO 2激光脉冲完全发展并且没有其它方法逃逸它穿过拉曼活性介质多次，直到它被转换成拉曼移动的波长，并通过拉曼子腔发射。只有16 m输出可以从系统发出，只需通过调整图中的光栅即可轻松地调整到628.32厘米-1附近。具体的腔体设计允许激光和拉曼光束的重复聚焦，即使在5至10 mJ的非常小的系统下也能够轻松实现阈值。该系统也可用于在室温和大气压下，在414.17厘米-1的S（2）旋转水平下产生斯托克斯辐射，仅需要用于MLIS工艺的商用大气CO2激光系统。此外，它可以被修改以使用反斯托克斯辐射过程产生二氧化碳波长的上转换。

3. 发明申请

WO1993026067A1 RAMAN DEVICE 审中-公开
标题翻译：拉曼装置
公开(公告)号：WO1993026067A1
公开(公告)日：1993-12-23
申请号：PCT/AU1993000286
申请日：1993-06-17
申请人： THE COMMONWEALTH OF AUSTRALIA , RICHARDS, James
发明人： THE COMMONWEALTH OF AUSTRALIA
IPC分类号： H01S03/108
CPC分类号： H01S3/305
摘要： An arrangement for a Raman laser shifter which uses a pressure cell (20) and optical elements (21-24) where the optical elements comprise mirrors (23, 24) and substantially pressure invariant lenses (21, 22) and which, in folded cavity design, is no longer than 50 mm and can thus be incorporated into existing laser systems.
摘要翻译：一种用于拉曼激光转换器的装置，其使用压力单元（20）和光学元件（21-24），其中光学元件包括反射镜（23,24）和基本上不变的压力不变透镜（21,22），并且在折叠空腔设计不超过50毫米，因此可以纳入现有的激光系统。

4. 发明申请

WO1989003131A1 INTRACAVITY RAMAN CELL RESONATOR 审中-公开
标题翻译： INTRACAVITY拉曼电容谐振器
公开(公告)号：WO1989003131A1
公开(公告)日：1989-04-06
申请号：PCT/US1988002962
申请日：1988-08-30
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , NARHI, Donald, E. , STULTZ, Robert, D.
IPC分类号： H01S03/108
CPC分类号： H01S3/1086
摘要： A cavity which is resonant at a laser pumping frequency is defined by a reflective surface (92) and a mirror (110). A Raman medium (106) is contained within the cavity, as is a laser (90). A Q-switch (94), when not spoiling the Q of the cavity, allows photon density to increase within the cavity. When the Raman threshold of the Raman medium is exceeded, the Raman medium absorbs and then radiates photons. The radiated photons are at a longer wavelength than the laser photons, and also occur in very short (less than ten nanoseconds) pulses. The radiated photons are reflected by a mirror (101) and exit the cavity through one of the reflectors defining the cavity (mirror 110). The invention shifts the wavelength and shortens the pulse duration of pulses produced by the laser (90).

5. 发明申请

WO1988006811A1 PHASE LOCKED MODE LASER GENERATOR 审中-公开
标题翻译：相锁模式激光发生器
公开(公告)号：WO1988006811A1
公开(公告)日：1988-09-07
申请号：PCT/FR1988000100
申请日：1988-02-23
申请人： CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE , BARTHELEMY, Alain , MANEUF, Serge , FROEHLY, Claude
发明人： CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
IPC分类号： H01S03/108
CPC分类号： H01S3/1112 , H01S3/0805 , H01S3/08054 , H01S3/08059 , H01S2301/085
摘要： Laser generator comprising a phase locking device of the laser generator modes, disposed between the amplifying active medium (3) and the reflecting rear mirror (1) and provided with, on the one hand, a non-linear and non-dispersive medium (5) placed in contact with said rear mirror (1) and, on the other hand, devices (11- 16) for transforming a gaussian beam with symmetrical revolution, emitted by the amplifying medium, into a beam with a morphology adapted to soliton propagation in said non-linear medium (5). The use of acoustic-optical modulators is rendered unnecessary. Application to a very broad wavelength range.
摘要翻译：激光发生器包括激光发生器模式的锁相装置，设置在放大活性介质（3）和反射后反射镜（1）之间，一方面具有非线性和非分散介质（5 ），另一方面，用于将由放大介质发射的具有对称旋转的高斯光束变换成具有适于孤子传播的形状的光束的装置（11-16）所述非线性介质（5）。使用声光调制器是不必要的。应用于非常宽的波长范围。

6. 发明申请

WO1997009758A1 TEMPERATURE MIS-MATCHED LASER 审中-公开
标题翻译：温度不匹配的激光
公开(公告)号：WO1997009758A1
公开(公告)日：1997-03-13
申请号：PCT/GB1996002171
申请日：1996-09-04
申请人： UNIPHASE LASERS LIMITED
发明人： UNIPHASE LASERS LIMITED , MACKINNON, Neil
IPC分类号： H01S03/108
CPC分类号： H01S3/109 , H01S3/042 , H01S3/0604 , H01S3/0612 , H01S3/0627 , H01S3/1643
摘要： A monolithic laser cavity (10) comprising a layer of gain material (12) and layer of non-linear material (14) wherein the layer of non-linear material is cut for critical phase matching the fundamental frequency of the gain material at a temperature which is different to that of the operating temperature of the laser cavity.
摘要翻译：包括增益材料层（12）和非线性材料层（14）的单片激光器腔（10），其中所述非线性材料层被切割以在温度下与所述增益材料的基频匹配这与激光腔的工作温度不同。

7. 发明申请

WO1991006140A1 PULSED LASER 审中-公开
标题翻译：脉冲激光
公开(公告)号：WO1991006140A1
公开(公告)日：1991-05-02
申请号：PCT/US1990005793
申请日：1990-10-10
申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY
发明人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY , GOODBERLET, James , FUJIMOTO, James, G. , SCHULZ, Peter, A. , WANG, Jyhpyng
IPC分类号： H01S03/108
CPC分类号： H01S3/1112 , H01S3/0057 , H01S3/08027 , H01S3/082 , H01S3/105 , H01S3/139 , H01S3/1625
摘要： This invention relates to a tunable solid-state laser which generates ultrashort output pulses with continuous wave pumping. The device includes a lasing (10) medium having a gain cross section of 10-18 cm2 or less and mode beating characteristics, which lasing medium is mounted in a laser cavity (14, 16, 18, 20). A continuous wave pumping beam is applied to the lasing medium causing an output, a portion of which is applied to an intensity dependent nonlinear cavity (29). The output applied to the nonlinear cavity is retroreflected back through the cavity and is interferometrically combined with the laser output. The relative lengths of the cavities are initially selected such that phase changes caused by the non linear medium result in substantially maximum enhancement of intensity peaks of the laser output, causing self starting of pulsed operation. Once pulsed operation is achieved, the cavity lengths may be adjusted to optimize interferometric addition of peak outputs and interferometric cancellation of pulse wings, resulting in a laser output formed of ultrashort pulses. For preferred embodiments, the laser is a titanium sapphire laser, and the nonlinear cavity contains a single mode optical fiber (32) which induces intensity dependent phase changes in an optical signal passing therethrough. A feedback circuit (38) is preferably provided to stabilize pulse operation.

8. 发明申请

WO1991005386A1 NONLINEAR OPTICAL DEVICE 审中-公开
标题翻译：非线性光学器件
公开(公告)号：WO1991005386A1
公开(公告)日：1991-04-18
申请号：PCT/GB1990001387
申请日：1990-09-07
申请人： 3i RESEARCH EXPLOITATION LIMITED , FRENCH, Paul, Michael, William , McCALLUM, David
发明人： 3i RESEARCH EXPLOITATION LIMITED
IPC分类号： H01S03/108
CPC分类号： H01S3/1109 , H01S3/109 , H01S3/2308
摘要： A nonlinear optical device comprises a nonlinear component such as a frequency doubling crystal (2) adapted to transmit pulses of electromagnetic radiation at a predetermined fundamental frequency and to generate one or more harmonic frequency signals therefrom. The device also includes a spectral filter device such as a dichroic mirror (4) capable of differentially attenuating optical signals at the fundamental frequency to a greater extent than those at a selected harmonic frequency. An amplifier (3) is tuned to amplify the optical signals at the selected harmonic frequency, and the amplified signals at the selected harmonic frequency are recombined together with transmitted optical signals at the fundamental frequency such that the optical signals at the selected harmonic frequency are at least partially reconverted into the fundamental frequency.
摘要翻译：非线性光学装置包括非线性分量，例如适于以预定基频传输电磁辐射的脉冲的倍频晶体（2），并从其产生一个或多个谐波频率信号。该装置还包括频谱滤波器装置，例如分色镜（4），其能够比基准频率处的光信号差异衰减到比所选谐波频率处的光信号更大的程度。调节放大器（3）以放大所选谐波频率处的光信号，并将所选谐波频率处的放大信号与基频传输的光信号重新组合，使得所选谐波频率处的光信号处于最少部分转化为基本频率。

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